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of heavy metal concentrations in different fractions in contaminated sediment before and after bioleaching were analyzed by selective sequential extraction, and it was discovered that the main...- and heterotrophic bacteria 1 Introduction With the development of metal processing, tanneries and electroplating industries [1], heavy metal contamination becomes a worldwide environmental problem......
adjusted by concentrated HCl or NaOH. After magnetic stirring for 1 h, the suspension was filtered and the clear solution was collected for analysis of the heavy metal concentration by ICP/AES... extraction was achieved for each heavy metal as follows: 86% for Pb, 98% for Zn, 82% for Fe, 96% for Cd, 62% for Cu, 80% for Al, respectively. And the main compositions of the finally obtained solid......
. Several adsorbents special for the removal of fluoride anion from the aqueous solution have been developed, namely activated alumina, bone char, calcite, clay, zeolite, rare metal-loaded resins, etc...] DHAKAL R P, GHIMIRE K N, INOUE K. Adsorptive separation of heavy metals from an aquatic environment using orange waste [J]. Hydrometallurgy, 2005, 79(3/4): 182-190. [11] DEMIRBAS A. Heavy metal......
Broadband 1.53 μm emission in Er3+-doped Ga-Bi-Pb-Ge heavy metal oxide glasses杨钢锋1,李涛1,21. Key lab of Specially Functional Materials, Ministry of Education, Institute of Optical Communication... and spectroscopic properties of the 1.53 μm emission from 4I13/2→4I15/2 transition of Er3+ ions in Er3+/Yb3+-codoped Ga-Bi-Pb-Ge heavy metal oxide glass for use in broadband fiber amplifiers. It was noted......
, but adsorbing Pb2+ is exothermic reaction. Key words: microwave; heavy metal ions; phosphogypsum; adsorption kinetics; adsorption thermodynamics 环境中的重金属离子污染日益引起人们的关注,进入环境的重金属离子最终会通过食物链进人体,最终在生物体内积累,破坏生物体的生理... for heavy metal ions adsorption onto microwave-preconditioned phosphogypsum 2.2.1 Lagergren伪一级吸附动力学 若重金属离子Cu2+,Pb2+,Cd2+和Zn2+在微波改性磷石膏上的吸附量qt随时间t呈指数变化,则表明吸附过程符合Lagergren伪一级吸附动力学[9]特征,即 ......
Selective removal of heavy metal ions in aqueous solutions by sulfide-selector intercalated layered double hydroxide adsorbentJing Wang1,Liang Zhang1,Tianshu Zhang1,Ting Du1,Tao Li2,Tianli... synthesized for selective heavy metal removal.The intercalation of sulfurated groups in the interlayer of the layered double hydroxide(LDH)nanosheets endows NFL-S as a selective heavy metal ion filter......
Effects of shear rates on radial distribution of different types of heavy particles in light media LI Jing-sheng(李敬生), WANG Juan(王 娟), SHEN Qin(沈 琴), ZHENG Ning-ning(郑宁宁) School of Chemistry...; Abstract: In order to study distribution properties of different types of heavy particles in light......
, and the distribution of Ni and Cd did not show significant characteristics. Key words: sewage sludge; heavy metals; metal fraction; sequential extraction; wastewater treatment plant (WWTP) 1 Introduction Disposal..., such as unpleasant odor, water pollution, danger to livestock and other animals, and contamination by heavy metals, have to be considered [6-8]. Toxic metal mobility in sewage sludge-amended soil at neutral......
Electrochemical Sensing of Heavy Metal Ions based on Monodisperse Single-crystal Fe3O4 Microspheres燕昊伟,胡双启School of Environment and Safety Engineering, North University of China摘 要:Single-crystal Fe3 O4 with monodisperse microspheres structure has been used for individual electrochemical detection of heavy metal ions. Morphology and structure......
